Graphene Sensoring

Luca Banszerus, Michael Schmitz

project report

Since the discovery of graphene in 2004 by a British team of researchers, it has been attracting great interest. By now it is one of the hottest topics of solid state physics and nanotechnology. Graphene is a mono-atomic honeycomb-lattice of sp2-hybridized carbon; it is exactly one layer of graphite. Because of its huge surface area and its extremely high carrier mobility graphene qualifies for very precise sensor applications in the physical, chemical and biological sector. During our project we were able to produce multiple graphene monolayers with lengths of more than 100μm on a Si/SiO2 substrate. Additionally we developed a technique to apply electrical contacts on our graphene flakes at school without relying on optical lithography and Lift-off, which can’t be conducted at school. Moreover we invented a method to optically determine the number of layers in mono- and few-layer-graphene. After we successfully deposited electrical contacts on our graphene we built multiple devices, such as different gas sensors and field-effect-transistors.

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